Abstract
A model for techno-economic and environmental evaluation and design of hybrid energy storage systems (HESS) in marine vessels is presented in this paper. This model aims at an assessment on a long-term perspective and accounts for the power and capacity degradation of the energy storage system and their influence on energy efficiency and equivalent CO2 emissions. A case study of energy storage to support Active Heave Compensation in an inspection ship is considered to illustrate the HESS design and evaluation methodology. Results show how the methodology is used to obtain a first assessment of performance trade-off between HESS sizing, cost, efficiency and equivalent CO2 emissions, helping to detect relevant HESS solutions to fulfil a given power profile.